Recently whenever i turn on my marshall valvestate 8080 it will hum very loudly for about 45-50 seconds, pop, and then work perfectly. I've narrowed it down to my amp, for my guitar/cables/pedals work fine with other amps.
thanks for the info, are you after a cause/cure for this or just telling everyone?
ah yeah haha sorry dude, i was trying to find a solution from someone out there..anyone have any ideas what could be wrong, and what i could do about it?